Cultivator attachment.



L. W. STEWART.

GULTIVATOB ATTACHMENT. APPLIOATIQN FILED MAB. 7, 1910.

981,493. Patented Jan. 10,1911.

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L. W. STEWART. OULTIVATOR ATTACHMENT. APPLICATION FILED MAR.7, 1910.

Patented Jan. 10, 1911.

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LON VZOODSON STEVART, OF THORP SPRING, TEXAS.

CULTIVATOR ATTACHMENT.

Application filed March 7, 1910.

To all whom it may concern:

Be it known that I, Lon \Voonson S'rnw- ART, a citizen of the UnitedStates, residing at Thorp Spring, in the county of Hood State of Texas,have invented certain new and useful improvements in CultivatorAttachments: and I do hereby declare the fol lowing to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to cultivators and similar implements, and hasfor one of its objects to provide an attachmentto devices of thischaracter whereby the cultivator hoe or shovel may be adjusted to diginto the ground any required distance beneath the surface, or to skimover the surface, as may be required, the adjustments being accomplishedwithout stopping the forward movement of the cultivator.

rtnother object of the invention is to provide a simply constructeddevice whereby the shovel or hoe member will yield when encounteringabnormal resistance and thus prevent the fracture of any of the parts.

Vith these and other objects in view, the invention consists in certainnovel features of construction as hereinafter shown and described andthen specifically pointed out in the claims; and. in the drawingsillustrative of the preferred embodiment of the invention. Figure l is aside ele ation of a portion of a conventional cultivator with theimprovement applied and the plow or cultivator member in position forskimming over the surface of the soil. Fig. is a plan view of the same,with the beam, operating lever, and relief spring in section on the line22 of Fig. 1. Fig. 3 is a view similar to Fig. 1 showing the plowarranged to dig into the ground.

The improved device may be applied to many forms of Cultivators, and itis not desired therefore to limit the invention to any specificconstruction of devices of this character.

For the purpose of illustration the improved device is shown applied toa conventional cultivator beam 10 having a down wardly directed rearportion. Pivoted at 11 to the downwardly directed portion of the beam isa standard member 12 having the cultivator hoe or plow 13 connected toits lower end.

Riveted or otherwise rigidly secured at 1 1 Specification of LettersPatent.

Patented Jan. 10, 1911.

Serial No. 547,710.

to the beam 10 above the pivotal point 11 of the standard is a bracket15 having an apertured terminal 16, the bracket being extendedrearwardly of the standard, as shown.

Pivoted at 17 to opposite sides of the beam 10 are two arms 1819, andpivoted at 20 between the arms in an operating lever 21. Connected tothe arm 18 is a toothed segment 22 with which a pawl device 23 carriedby the lever engages, so that the lever and the arms may be maintainedin any position to which they may be ad'- justed.

Pivoted at its ends at 24-25 to the lower end of the lever 21 and to theupper end of the standard 12, is a link bar 26, the latter beingprovided with a longitudinal slot 27. Extending through the aperturedhead 16 of the bracket is a bolt 28 having a pin 29 at its lower endengaging slidably in the slot 27. he bolt 28 is provided with anadjusting nut 30, and surrounding the bolt and bearing at its endsbetween the nut and the bracket is a spring 31. By this arrangement theforce of the spring is exerted to main tain the link bar 26 yieldably inengagement with the bracket, while at the same time the link bar ismovable longitudinally of the bracket within the rai'ige of the slot. 3ythis arrangement the standard 12 may be set to locate the point of thehoe 13 at any desired point relative to the beam and to the surface ofthe ground. Thus if it is desired that the hoes shall dig relativelydeep into the soil, which is required when cultivating some forms ofplants, then the lever 21 is adjusted to move the upper end of thestandard l2 forwardly and the lower end rearwardly to incline the pointof the hoe to agreater extent, but if it is desired to cause the hoe totravel nearer the surface of the ground, or to skim over the surface,then the lever 21 is adjusted to move the upper end of the standardrearwardly, as will be obvious.

The spring 31 possesses sufficient strength to hold the link bar 26 andits attachments against any strains to which they will be subjectedduring the ordinary operations of the hoe 13. In event however of thehoes meeting with abnormal obstructions, as for instance grubs, stones,or the like, which would cause the fracture of the hoe or other parts,the spring 31 will yield and the standard 12 swinging upon its pivot 11will permit the hoe to pass over the obstructions. This abnormalmovement of the standard causes the arms 1819 and their attachments toswing upon the pivot 17 and assume the position shown in dotted linesFig. l, which represents the position of the parts when the hoe ispassing over obstructions, as above noted. By this simple means theinclination of the hoe may be readily adjusted to any re quired extent,to quickly adapt the device to the condition of the ground or the plantswhich are being cultivated.

Cultivators of the class described are usually provided with a pluralityof beams 10, and each of the beams will be provided with its separateand independent hoe adjusting mechanism, as will be. obvious, but theseparts are not shown as they form no part of the present invention.

The lever 21 is within easy reach of the driver upon the seat of thecultivator, not shown, so that the adjustments can be accomplishedwithout stopping the team. It frequently happens that it is desirable tochange the position of the hoes at different points in the same row, andthis can be readily accomplished by the driver by manipulating thelevers 21 from his seat, and without stopping the team.

What is claimed is 1. The combination with a cultivator beam of astandard swinging from the beam and carrying a cultivator hoe, an armswinging from said beam, an operating lever pivoted to said swingingarm, means for locking said lever to said swinging arm, a link bar connecting said lever and standard, and means for maintaining said link baryieldably in its upper position.

2. The combination with a cultivator beam of a standard swinging fromthe beam and carrying a cultivator hoe, an arm swinging from said beam,an operating lever pivoted to said swinging arm, a link bar between saidlever and standard, means for locking said lever to said swinging arm, abracket connected to said beam, and a spring upon said bracket andoperating to maintain said link bar yieldably in its upper position.

3. The combination with a cultivator beam of a standard swinging fromthe beam and carrying a cultivator hoe, an arm swinging from said beam,an operating lever pivoted to said swinging arm, means for locking saidlever to said swinging arm, a link bar between said lever and standardand provided with a longitudinal slot, a bracket ex tending rearwardlyof said beam, a bolt extending through said bracket and slidablyengaging said link bar slot, and a spring surrounding said bolt andengaging said bracket and operating to maintain said link bar yieldablyin its upper position.

4. The combination with a cultivator beam of a standard swinging fromthe beam and carrying a cultivator hoe, an arm swinging from said beam,an operating lever pivoted to said swinging arm, means for locking saidlever to said swinging arm, a bracket extending rearwardly of said beam,a link pivoted at one end to said beam and bearing beneath said bracketand provided with a lateral pin at its free end, a spring engaging saidbracket and operating to maintain said link yieldably in its upperposition, and a link bar connected at its ends to said lever andstandard and provided with a longitudinal slotslid-

